Hello,
We can check what planes are mapped to a particular CB using below command:
user@host> show chassis fabric plane-location
------------Fabric Plane Locations-------------
Plane 0 Control Board 0
Plane 1 Control Board 0
Plane 2 Control Board 1
Plane 3 Control Board 1
Plane 4 Control Board 2
Plane 5 Control Board 2
From the above output, to find the uptime of Control Board 0, check the uptime of Plane 0 and 1 mapped to it using "show chassis fabric summary"
When a CB is installed, the planes mapped to it also come online. So this is one way we can see how long the control board is up.
From the below output I can say CB0 is up for around 2 minutes.
user@host> show chassis fabric summary
Plane State Uptime
0 Online 2 minutes, 9 seconds
1 Online 2 minutes, 2 seconds
But we must remember that if plane 0 and 1 are showing different uptime, it could be possible that one plane went offline due to some issue in the past.
So we must ensure that all the planes mapped to a particular CB show show same uptime to determine what time CB came online.
SECOND OPTION :
"show chassis environment cb" will only show the status of the CB.
SPMB is a board installed in CB which is initialized when CB comes online.
The SPMB uptime can be checked using below command which also tells how long the CB is online.
SPMB 0 corresponds to CB 0 and SPMB 1 to CB1.
user@host> show chassis spmb
Slot 0 information:
State Online
Total CPU Utilization 98%
Interrupt CPU Utilization 0%
Memory Heap Utilization 1%
Buffer Utilization 44%
Start time: 2012-12-03 11:47:23 PST
Uptime: 2 hours, 16 minutes, 39 seconds <<<<<<<<<<
Slot 1 information:
State Online - Standby
Total CPU Utilization 0%
Interrupt CPU Utilization 0%
Memory Heap Utilization 0%
Buffer Utilization 22%
Start time: 2012-12-03 11:47:19 PST
Uptime: 2 hours, 16 minutes, 43 seconds <<<<<<<<<<
{master}
THIRD OPTION:
At last to verify when your CB came online is to check the log messages. Use the below command:
>show log messages | match "Fru online"
Use the Third option to check from logs to find when PEM came online. The commands like "show chassis power" and "show chassis environment pem" will not show the PEM uptime.
Let me know if this works..
Regards,
Rahul